871191cf999816108047749e67a352... - Clean (16/100) - DriverShield Analysis

Analysis of 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys: clean verdict, risk score 16/100. 0 YARA matches, 0/76 multi-engine detections. SHA256 871191cf99981610. Kernel imports, IOCTL codes, MITRE ATT&CK, and code-signing details.

871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys - Analysis Report

DriverShield analyzed the Windows kernel driver 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys and assigned a verdict of Clean with a composite risk score of 16/100, indicating no notable risk signals (0-29 band).

Verdict	Clean (16/100)
YARA matches	0
Multi-engine detections	0 / 76
File size	21960 bytes
Code-signing signer	Microsoft Windows Early Launch Anti-malware Publisher
Analyzed	2026-09-06
SHA256	871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0c458
SHA1	c4d51a58d1f2209af49e5ea4780014a0441634f2
MD5	6f8ece4248ab344eb018b7ddcaeeace3

Driver identity

Version resource data embedded in the 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys PE header, as extracted by the analysis engine.

File description	AVG ELAM Driver
Product	AVG Internet Security System
Company	AVG Technologies CZ, s.r.o.
Original filename	aswElam.sys
Internal name	aswElam
File version	21.8.277.0
Copyright	Copyright (C) 2021 AVG Technologies CZ, s.r.o.

How the 16/100 score breaks down

Each component is scored 0-100 and then weighted into the composite. See the analysis methodology for the exact formula.

Component	Sub-score
Multi-engine consensus	0 / 100
YARA signature matches	0 / 100
Dangerous kernel imports	30 / 100
IOCTL dispatch surface	51 / 100
Known-vulnerable corpus	0 / 100
Code-signing state	80 / 100
Packing and entropy	0 / 100
Dynamic behaviour	0 / 100
CVE cross-reference	0 / 100

Kernel imports (3)

Kernel-mode APIs resolved from the Import Address Table of 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys, ranked by exploitation relevance.

API	Risk	Why it matters
MmGetSystemRoutineAddress	high	Potentially dangerous - could be used for privilege escalation or security bypass
ExAllocatePoolWithTag	low	Standard kernel API - generally benign
RtlInitUnicodeString	low	Standard kernel API - generally benign

IOCTL dispatch codes (17)

Control codes reachable through the driver dispatch routine. Codes tied to published exploit code are flagged, since they are the primary Bring Your Own Vulnerable Driver (BYOVD) entry points.

Code	Severity	Transfer	Description
0x00340033	high	METHOD_NEITHER	FILE_DEVICE_DISK Function #12
0x00340043	high	METHOD_NEITHER	FILE_DEVICE_DISK Function #16
0x002200F0	medium	METHOD_BUFFERED	FILE_DEVICE_UNKNOWN Function #60
0x0034036C	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #219
0x00340042	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #16
0x00340044	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #17
0x00340030	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #12
0x00340035	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #13
0x00340036	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #13
0x00340046	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #17
0x00340034	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #13
0x00340032	medium	METHOD_OUT_DIRECT	FILE_DEVICE_DISK Function #12
0x00340039	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #14
0x00340038	medium	METHOD_BUFFERED	FILE_DEVICE_DISK Function #14
0x00340031	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #12
0x00340041	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #16
0x00340045	medium	METHOD_IN_DIRECT	FILE_DEVICE_DISK Function #17

PE sections

Section layout and Shannon entropy. High entropy in a code section is a packing or encryption indicator.

Section	Virtual size	Raw size	Entropy	Flags
.text	0x0E92	0x1000	5.92	CODE, EXEC, READ
.rdata	0x051C	0x0600	3.4	IDATA, READ
.data	0x0070	0x0200	0.28	IDATA, READ, WRITE
.pdata	0x009C	0x0200	1.3	IDATA, READ
INIT	0x020E	0x0400	3.13	CODE, EXEC, READ, DISCARD
.rsrc	0x0EF0	0x1000	3.25	IDATA, READ, DISCARD
.reloc	0x001C	0x0200	0.36	IDATA, READ, DISCARD

Exploit mitigations

Control Flow Guard	Enabled
ASLR	Enabled
DEP	Enabled
Integrity check	Not enforced
Mitigation score	85 / 100

CFG Enabled - Control Flow Guard is active - indirect calls are validated against a bitmap of valid targets at runtime.
ASLR Enabled - Address Space Layout Randomization is active - base address is randomized on each load.
DEP/NX Enabled - Data Execution Prevention is active - non-executable pages cannot be executed.
Expired Certificate - The driver is signed but the certificate has expired. Windows may still load it depending on revocation policy.

MITRE ATT&CK techniques (5)

Techniques this driver could enable if loaded by an adversary.

ID	Technique	Tactic
T1071	Application Layer Protocol	Command and Control
T1211	Exploitation for Defense Evasion	Defense Evasion
T1543.003	Windows Service	Persistence
T1553.002	Subvert Trust Controls: Code Signing	Defense Evasion
T1652	Device Driver Discovery	Discovery

Code-signing chain

Signer	Microsoft Windows Early Launch Anti-malware Publisher
Signer organisation	Microsoft Corporation
Issuer	Microsoft Code Signing PCA 2010
Serial	33000003ABCF8F4B25E125F5740000000003AB
Valid from	2020-12-15 21:23 UTC
Valid until	2021-12-02 21:23 UTC (expired)
Signature validity	Not verified

Certificate revision: 0x0200
Certificate type: PKCS#7
Chain: Microsoft Code Signing PCA 2010

Symbolic execution

Engine angr, status static_approximation, 0 paths explored at a maximum depth of 0. Vulnerability classes reached: 0. Exploitable paths: 0.

Frequently asked questions about 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys

Is 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys safe?

Based on DriverShield static and dynamic analysis, 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys is assessed as clean, with no notable risk signals. Its composite risk score is 16/100 (verdict: clean). Always validate findings independently before acting.

What is the risk score of 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys?

871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys has a DriverShield composite risk score of 16/100, placing it in the clean verdict band. SHA256: 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0c458.

What is 871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys?

871191cf999816108047749e67a35225e2bd271c4b482c7f6e412dda41c0.sys is a Windows kernel-mode driver (.sys) analyzed by DriverShield for vulnerabilities, BYOVD abuse potential, and malware indicators. It is code-signed by Microsoft Windows Early Launch Anti-malware Publisher.